Latch



Patented Apr. 8, 193i) TES PATE NT OFFICE 5EWALD MEININGHAUS, OF LANCASTER, NE\V. YORK LATGH Application filed'anuary2i 192a. Serial N0. 335,038.

'Ihis invention relates 130 a latch :for swinging cloors 01 winclows ancl more particulzirly t0 a clevice which willhold the door or Winclow ajar so as t0 provide aclequate ventilation withouta draft, such a cle vice being applicable for use 0n automobiles 0r in the d00rs of houses 130 hold the cloors open ancl provicle fresli ancl cool air without liability 0f the cloors swinging shut.

One 0f the principal objects of this invention is to provicle such a latch Which automatically locks a swinging d00r or winclow in the desirecl open Position upon. 0pening the same and Which can be easily releasecl to permit 0f closing tl1e cloor or winclow.

A further aim is to provicle such a devi 0e Which is inexpensive, simple, compact ancl str0ng, ancl Will not getout of orcler er out of g00cl working condition through constant 0r severe use.

Another purpose is to provide such alzitc'h which is adaptecl f0r use 011 a sWinging (1001 01' window Which swings either t0 the right or to the left bj means 01": a verysimple reorganization 0f the parts when su'ch reorganizati0n is necessary.

A ssill further objeet is to provide such a clevice Whi0h is attractive in appearancev ancl 0ccupies but a small space 011 the'fiame of be cloor o1 winclow.

In the accompanying clrawin'gsr v Figure 1 is a fragmentztry sicle elevation 0f a cloor ancl door frame showing 'my inventi0n appliecl thereto, the door being shownin its closed osition. v

- Figure 2 is a fragmentary topplan view of a d00r frame ancl d00r shoWi1ig my latch appliecl thereto, the latch being shown in the position in which it holds the door against closing, a partially closed positi0n 0f the latch ancl d00r being shown in d0tted lines.

Figu re 3 is a horizontal section through the door ancl cloor frame taken on line, 3'3, Fig. 1, looking upwarclly.

Figure 4: is a fragmentary longitudinal section 0f my latch taken on line 44 Fig. 3.

Figure 5 is a transverse section, taken 0n l1 ne 55 F1g. 4. S1m1lar characters of'reference indieate like part's inthe several views of the draW- ings. 1

In its general organization this invention is aclapt'ed for'use in holcling tw0 relative swinging members ajar and inclucles an arm pivotecl 130 one 01 saidmembef3, a second arm pivotally connecting the first arm and the other 0f said members and a latchbar carried byone 0f the arms ai1d aclapted 110 catch ancl hold the other arm when the mexnbers are 0pened anal prevent a return or folcling move ment-of the arms except when the catch is released.

In the accomp'anying drawings, the inve1r ti0n is shown as appliecl t0 a door D Whi0h is 'hung in a cloor frame F by meansoi tl1e usual hinges H. A plate 10 is'suitably securecl to the ndersicle ofthe top bar of the cloor frame arm 12, the arm 12 thereby having an outwardly projecting*end 16 which in the 02:-

tend0d or 1infolcled portion 0f the arms everlaps the arm 13.

It is appareht that when the cl00r is opened the arms Will l0e 'unfoldeol '01 m0ved into straightened relation 130 one another and that When the cl0or is cl0sed the arms will bacol- 121psecl or foldeclas indicatecl by cl0tted lines in Fig. 2 and Will fold into'a position immediately beloW the clo0r fr'ame as indicated in Fig.3. In Order to hold the arms against tothe positionshown in Fig. 2, a0atch is 1roVided Which ispreferably const ructecl as foll0ws: Asbest shown in Fig. 4 the pivot pin14 which co nnects the two arms 12 and 13 is f0rmed at its l0wer end toprovide a rou'nded heacl 0r seat 17 and als0 a downwardly projectingneck 18 at the lovver end of this head. T0 this neck 18 a catch bar 19 is seeur0d, this folding when the door has been swung open mounted, said cat ch bar being prvided with catch projection arranged in t-he path f necced to one of Said members, a second. arm

pivotally connected 130 the osher member and said first arm, a catch bar movably mounted 011 one of said arms, means yieldingly holding said bar against the arm on Whi ch it is monnted, said catch bar being pr0vided with a catch projection arranged in the path of the other arm, said catch project-ion permitfing said other arm to ridethereover when said arms are extended and thereafter preventing a folding movement 0f said arms, and means for preventing said arms from passing beyond their dead center.

5. A latch for tw0 relatively swinging members, comprising an arm pivotally sonnected to one of said members, a second arm pivotally c0nnected to the other member and pivotally connected between its ends t0 the Other arm thereby to provide portions of said arms which overlap in the unfolded Position of sa1d arms, a catch bar movably secured at one end 1:0 the outer side 01 one of said arms and having a projection arranged in the path 0f the overlapping portion of the othr arm and adapted to catch and hold said overlapping portion of the other arm when said arms are unfolded, and meansfor preventing said arms from passing beyond their dead center.

6 A. latch for two relatively swinging members, comprising an arm pivotally 0011- nected t-0 one of sa1d members, a second arm k pivotally connected to the other member and pivotally connected between its ends to the other arm thereby to provide portions of said arms which 0Verlap in Ehe unfolded position 0f said arms, a catch bar movably secured at one end to the outer side of one of said arms and having a projection arranged in the path 0'f the overlapping portion of the other arm and said projection being adapted to catch and hold said overlapp-ing portion 0T: the other arm when saicl arms are unfolded and means for prevent-ing said arms from passing beyond their dead centernomprising a removable holt carried by one 0f said arms and projecting into the path of the other arm. 7. A 1atch for two relatively swinging members, comprising an arm pivotally connected t0 one of said members, a second arm pivot-ally connected to the other member, a pivot pin extending through said armsand connecting one of said arms with an intermediate ortion of the other arm thereby 130 provide portions of said arms which overlap in the unfolded posit-ion of said arms, a cat lh bar.

8. latcjh for two ralatively swinging members, compriszing an arm pivotally conbar mounted on the outer side 'of one O'f said arms for 11'00vement toward and from said arm, Said catch bar being pr0Vided With a hected to one of said membe1s, a second arm v pivotally connected othe othermemben a pnrot 13111 extend1ng through sa1d arms and connectmg one of sa1c1 arms xv1than misermediatePortion 0f the 0ther arm thereb y t0 provide portions of Said ar1'r'ns which overlap in the unfolded p0siti0n of said arms, a catCh bar mount6d on the outer side 0f one of'said arms f0r' movement towardand 'from said arm, said catch bar being provided with a pair 0f catch projections adapted to catch the overli1pping portion of the other arm when said arms are unf01ded and prev6nt their reverse movementand a SCI'GW extendin9;

through Said catch bar and the arm onwhich said catch bar is mounted a11d arranged in the path of the overlapping portiqn of the o'her arm to prevent movemeintf said arms beyond their dead cent-erQ 9. A latch for two relatively swinging members, comprising an arm pivotally counected 130 one of said members, a seconcl arm pivotally connected to the other member, a pivot pin extending through said arms and connecting one of said ar1ns Wih an intermediate portion 0f the other arm thereby to provide portions 015 said arms W.Hich overlap in the unfolded position of said arms, a catch bar loosely secured ab one end to the pivot pin connecting said arms, said catch bar being provided with catch projections adapted to catch the overlapping portion of the othr arm when said arms are unfoldecl and prevent their reverse movement and spring means for holding said catch bar in its operative position.

10. A laf-ch for two relatively swinging members, Comprising an arm pivotally couneeted 130 one of said members, a second arm pivotally connected to the' other member, a

pivot pin extending through said arms' and 1 connecting one of said arms with an intermediate ortion Cf the other arm thereby to y s'aidcatch barbeingseated an said roun ded head topermit 1novexnent of said catch bar toward and from said arms, and spring means tending to hold said Catch bar against the adj'acenb arm saicl catch bar being provided with a c'atch projection adapted to catch the "overlapping Portion of the other, arm when said arms am unf0lded thereby 130 prevent their reverse movement. 11. A latch for two relatively swinging members comprising an arm piv otally 0011- nected at one end to one of said members, a second ar1n pivotally connected to the ocher member, a pivot pin having a rounded head 5 connecting the end of said first arm with an intern1ediate portion o'f sztid second arm, said second arm thereby having its end projecting beyond said pivot pin, a catch bar 1nounted f01' rocking movement 011 said rounded head, a screw secured to saidprojecting end and extending through said catch bar, the end of' said; sc1ew extending into the path of said first arm und limiting the opening movemenfi of said arms, 21. spring interpos'ed between the head of said screw and said catcn bar, and catch projections formed on opposite sides of said catch bar und project-ing outwardly a1ong opposite-sides of said projecting end, saidcaich projections being adapted to catch and releasably hold said first arm, thereby .to

prevent said arms fro1n folding. In testimony whereof I here;by afi'1x-my signature.

EWALD MEININGHAUS. 

